72651305 has 8 divisors (see below), whose sum is σ = 88611144. Its totient is φ = 57168000.

The previous prime is 72651281. The next prime is 72651317. The reversal of 72651305 is 50315627.

It can be written as a sum of positive squares in 4 ways, for example, as 6911641 + 65739664 = 2629^2 + 8108^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 72651305 - 2¹² = 72647209 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 118796 + ... + 119405.

It is an arithmetic number, because the mean of its divisors is an integer number (11076393).

Almost surely, 2^72651305 is an apocalyptic number.

It is an amenable number.

72651305 is a deficient number, since it is larger than the sum of its proper divisors (15959839).

72651305 is a wasteful number, since it uses less digits than its factorization.

72651305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238267.

The product of its (nonzero) digits is 6300, while the sum is 29.

The square root of 72651305 is about 8523.5734876870. The cubic root of 72651305 is about 417.2674167998.

The spelling of 72651305 in words is "seventy-two million, six hundred fifty-one thousand, three hundred five".